“She got us into Libya and she got us into Benghazi and she’s probably got 40 eggheads sitting around a table telling her what to do, and then she was sleeping when the phone call came in from the ambassador begging for help. You know, the 3 a.m. phone call?”

I asked the brand baron if he’s concerned that his brand has gone from fun to scary, from glittery New York celebrity to “S.N.L.” skits about him featuring allusions to the K.K.K. and Hitler. He blamed a “disgustingly dishonest” press.

I wondered about ex-wife Ivana telling her lawyer, according to Vanity Fair, that Trump kept a book of Hitler’s speeches by his bed. Or the talk in New York that in the ’90s he was reading “Mein Kampf.” Nein, he said. “I never had the book,” he said. “I never read the book. I don’t care about the book.”

All over town, even in the building where I’m writing this column, freaked-out Republicans are plotting how to rip the nomination from Trump’s hot little hands.

How does it feel to be labeled a menace, misogynist, bigot and xenophobe by your own party? “Honestly,” he replied, “I’m with the people. The people like Trump.”

Since he prefers to rely on himself for policy advice, is he seeking out expert help on the abstruse delegate rules? “Yeah,” he said, “I have people, very good people, the best people.” No details, as usual.

Won’t a contested convention require more of a campaign than après moi, le déluge? “I have an organization but it’s largely myself,” he said.

More heavyweights are jumping in to stomp Trump, including Elizabeth Warren. Asked about her jabs, he pounced: “I think it’s wonderful because the Indians can now partake in the future of the country. She’s got about as much Indian blood as I have. Her whole life was based on a fraud. She got into Harvard and all that because she said she was a minority.”

Told that President Obama was mocking his wine as $5 wine marked up to $50, Trump shot back, “My wine has gone through the roof.”

What about Mitt Romney, who’s pushing for an open convention? “He’s a jealous fool and not a bright person,” Trump said. “He’s good looking. Other than that, he’s got nothing.”

Paul Ryan, who will be leading the G.O.P. convention in Cleveland, says there could be a floor fight. But he protested that he would, no, no, never take it himself, just as he once said about the speakership.

Ryan snickered at the idea that Mexico would pay for the wall and chided Trump for warning that there would be riots at the convention if the Gasping Old Party tried to snatch the nomination. Was the speaker interested in seizing the crown himself?

“I don’t think so,” Trump said, noting that he liked Ryan and that they’d talked. “All that matters is the votes. I see people making statements about me that are harsh and yet they are calling me on the other line saying, ‘Hey, when can we get together?’”

Mitch McConnell also urged Trump to ratchet down the ferocity. Trump insisted that “the violence is not caused by me. It’s caused by agitators.” He added that “Hillary is the one disrupting my rallies. It’s more Hillary than Sanders, I found out.” The Clinton campaign called this “patently false.”

But shouldn’t parents be able to bring children to rallies without worrying about obscenities, sucker punches, brawls and bullying? “The rallies are the safest places a child could be,” Trump replied primly.

Didn’t the man rushing the stage give him pause? “I got credit for that because it looked like I was moving toward him,” he said.

Trump said that when the “agitators” scream and the crowd screams back, “Frankly, it adds a little excitement.” But there must be a safer, saner way to get some oomph.

I wondered if he realized that, in riling up angry whites, he has pulled the scab off racism. “Obama, who is African-American, has done nothing for African Americans,” he replied.

He said he would soon unleash the moniker that he thought would diminish Hillary, the way “Little Marco” and “Lyin’ Ted” torched his Republican rivals; “I want to get rid of the leftovers first.”

When he mocks Hillary, as he does in a new ad that shows her barking, it may backfire. Due to his inability to let go of his chew toy Megyn Kelly, Trump drew a remarkable rebuke Friday night from Fox News after he called for a boycott of her show and tweeted that she was “crazy” and “sick.” Fox painted Trump as a stalker, saying he had an “extreme, sick obsession” with the anchor. Unable to resist, even though he knows I respect Kelly, he also described her to me as a “total whack job” with “no talent.”

He has a history of crude remarks about women from his visits to Howard Stern’s show that could be used in Hillary ads. A conservative anti-Trump “super PAC” is running an ad with women repeating his coarse remarks.

“All of these politicians have said far worse than that,” Trump said, “drunk, standing in a corner.”

Joe Scarborough said that just as F.D.R. was the master of radio and J.F.K. of television, D.J.T. is the titan of Twitter. The titan agreed, gloating about how his tweets to his seven million followers, sometimes penned in his jammies, become cable news bulletins. “Yeah,” he said, “I’ll do them sometimes lying in bed.”